EXHIBIT 99.4
                                                                  ------------


               CERTIFICATION REQUIRED BY RULE 13A-14(A) OR 15D-14
                     OF THE SECURITIES EXCHANGE ACT OF 1934

CERTIFICATIONS


I, John P. Dielwart, certify that:

1.   I have reviewed this annual report on Form 40-F of ARC Energy Trust;

2.   Based on my knowledge,  this report does not contain any untrue statement
     of a material fact or omit to state a material fact necessary to make the
     statements  made,  in  light  of  the  circumstances   under  which  such
     statements  were made, not misleading  with respect to the period covered
     by this report;

3.   Based on my knowledge,  the  financial  statements,  and other  financial
     information  included  in this  report,  fairly  present in all  material
     respects the financial condition, results of operations and cash flows of
     the issuer as of, and for, the periods presented in this report;

4.   The  issuer's  other  certifying   officer  and  I  are  responsible  for
     establishing  and  maintaining  disclosure  controls and  procedures  (as
     defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the issuer and
     have:

     a)   Designed such  disclosure  controls and  procedures,  or caused such
          disclosure   controls  and  procedures  to  be  designed  under  our
          supervision,  to ensure that  material  information  relating to the
          issuer, including its consolidated subsidiaries, is made known to us
          by others within those entities,  particularly  during the period in
          which this report is being prepared;

     b)   Evaluated the effectiveness of the issuer's  disclosure controls and
          procedures  and presented in this report our  conclusions  about the
          effectiveness of the disclosure  controls and procedures,  as of the
          end of the period  covered by this report based on such  evaluation;
          and

     c)   Disclosed in this report any change in the issuer's internal control
          over financial  reporting that occurred during the period covered by
          the annual  report that has  materially  affected,  or is reasonably
          likely to  materially  affect,  the issuer's  internal  control over
          financial reporting; and

5.   The issuer's other certifying officer and I have disclosed,  based on our
     most recent evaluation of internal control over financial  reporting,  to
     the issuer's  auditors and the audit  committee of the issuer's  board of
     directors (or persons performing the equivalent functions):

     a)   All significant  deficiencies and material  weaknesses in the design
          or operation of internal control over financial  reporting which are
          reasonably  likely to  adversely  affect  the  issuer's  ability  to
          record, process, summarize and report financial information; and

     b)   Any fraud,  whether or not  material,  that  involves  management or
          other employees who have a significant role in the issuer's internal
          control over financial reporting.

Date: March 29, 2006


/s/ John P. Dielwart
-------------------------------------
John P. Dielwart
President and Chief Executive Officer